Publikation:

Direct observation of magnetic metastability in individual iron nanoparticles

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2014

Autor:innen

Balan, Ana
Derlet, Peter M.
Rodríguez, Arantxa Fraile
Bansmann, Joachim
Kleibert, Armin
Nolting, Frithjof

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http://nbn-resolving.de/urn:nbn:de:bsz:352-279163
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https://doi.org/10.1103/PhysRevLett.112.107201
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Published

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Physical Review Letters. 2014, 112(10). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.112.107201

Zusammenfassung

X-ray photoemission electron microscopy combined with x-ray magnetic circular dichroism is used to study the magnetic properties of individual iron nanoparticles with sizes ranging from 20 down to 8 nm. While the magnetocrystalline anisotropy of bulk iron suggests superparamagnetic behavior in this size range, ferromagnetically blocked particles are also found at all sizes. Spontaneous transitions from the blocked state to the superparamagnetic state are observed in single particles and suggest that the enhanced magnetic energy barriers in the ferromagnetic particles are due to metastable, structurally excited states with unexpected life times.

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ISO 690BALAN, Ana, Peter M. DERLET, Arantxa Fraile RODRÍGUEZ, Joachim BANSMANN, Rocio YANES DÍAZ, Ulrich NOWAK, Armin KLEIBERT, Frithjof NOLTING, 2014. Direct observation of magnetic metastability in individual iron nanoparticles. In: Physical Review Letters. 2014, 112(10). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.112.107201
BibTex
@article{Balan2014Direc-27916,
  year={2014},
  doi={10.1103/PhysRevLett.112.107201},
  title={Direct observation of magnetic metastability in individual iron nanoparticles},
  number={10},
  volume={112},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Balan, Ana and Derlet, Peter M. and Rodríguez, Arantxa Fraile and Bansmann, Joachim and Yanes Díaz, Rocio and Nowak, Ulrich and Kleibert, Armin and Nolting, Frithjof}
}
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